readme: mention sixel in the intro, drop the diffing brag

1 files changed, 7 insertions, 7 deletions

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 # sl0pboy — a Game Boy Color emulator that lives in your terminal
 
 A from-scratch GB / GBC emulator in plain C11 that paints straight to the
-terminal — no window, no GPU, just truecolor ANSI and the upper-half-block
-trick (`▀`): every character cell = two stacked pixels (fg on top, bg on
-bottom). That squeezes the 160×144 screen into 160×72 cells.
+terminal — no window, no GPU. Two ways to draw it:
+
+- **half-blocks** (the default): truecolor ANSI + the upper-half-block trick
+  (`▀`), where every character cell = two stacked pixels (fg on top, bg on
+  bottom), squeezing the 160×144 screen into 160×72 cells. Works anywhere with
+  truecolor.
+- **sixel** (`--sixel`): real pixels on terminals that speak it (see below).
 
-To keep your terminal from crying, it only emits SGR escapes when a color
-changes, and it **diffs frames** — only redrawing cells that moved (skipping
-unchanged runs with `ESC[row;colH`). A static screen writes *nothing* after
-frame one; on acid2 that dropped output from ~7.1 MB to ~65 KB over 2 s (≈108×).
 Resize the terminal and `SIGWINCH` triggers a full repaint.
 
 ## Build & run